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Finding the Fourth Proportional to 259.76, 389.95 and 121.07

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Solution

The fourth proportional to 259.76, 389.95 and 121.07 is: 181.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.76 : 389.95 = 121.07 : x
  2. Step 2: Convert to fraction form
    259.76/389.95 = 121.07/x
  3. Step 3: Cross multiply
    259.76x = 389.95 × 121.07
  4. Step 4: Simplify right side
    259.76x = 47,209.70
  5. Step 5: Solve for x
    x = 47,209.70/259.76
  6. Step 6: Final answer
    x = 181.75

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